Ringer Equivalence Number - International Usage

International Usage

In the United Kingdom it is called the ringer equivalence number and a maximum of 4 is allowed on any British Telecom (BT) line.

In Australia it is also called ringer equivalence number and a maximum of 3 is allowed on any Telstra or Optus Line.

In Canada it is called a Load Number (LN); which cannot exceed 100. (The LN of each device represents the percentage of total load allowed).

In Europe 1 REN used to be equivalent to an 1800Ω resistor in series with a 1 µF capacitor. The latest ETSI specification (2003-09) calls for 1 REN to be greater than 16 kΩ at 25 Hz and 50 Hz.

Read more about this topic:  Ringer Equivalence Number

Famous quotes containing the word usage:

    Pythagoras, Locke, Socrates—but pages
    Might be filled up, as vainly as before,
    With the sad usage of all sorts of sages,
    Who in his life-time, each was deemed a bore!
    The loftiest minds outrun their tardy ages.
    George Gordon Noel Byron (1788–1824)